Symantec Email Proxy Virus and other IE self-running pages

I've spent a good amount of time this Thanksgiving weekend trying to resolve several virus attacks. I've been somewhat successful in solving them, but two problems just won't go away. I've got symanetc proxy messages popping up and I can't seem to stop them. I get email post-it like messages and larger messages relating to the undeliverability of "my messages" --- aka SPAM --- that I didn't send.

I've followed other's advice from this forum, like running cwshredder, AboutBuster, and hsremove (the last two in Safe Mode) and I've tried Windows Upgrade but was unable to upgrade due to an error message.

My other problem is that I constantly see pop-up boxes flash on the screen. When I run IE and check the history file I find a long list of sites that I did not visit. My home page settings and other settings, like "show picture" in advanced settings were also altered.

Symantec anti-virus also catches a virus called "Dialer.Sfonditalia but there is no evidence of it being in my registry or files. Although it gets quarantined, it still comes back.

So... here's my HijackThis log. Can someone please take a look at it and help me out?